Drapery and sheet material cleaning machine

ABSTRACT

A machine for cleaning sheet materials such as draperies, or the like, by the abrading action of minute particles which serve as carriers for a cleaning compound. The draperies are first tumbled with the particles until the draperies are cleansed. Thereafter, the draperies are subjected to a stream of air of a desired velocity as they are tumbled to remove the particles therefrom. The velocity of the stream of air chosen to so remove particles is related to the weight of the draperies; that is, the heavier the draperies, the greater will be the velocity of the air stream employed to remove the particles. After removal from the draperies, the particles are carried by the stream of air to a number of inverted filter bags. These bags are sufficiently porous as to permit air to pass therethrough, but capture the particles within the confines thereof. The bags are subjected to vibration whereby the particles adhering to the interior of the bags are dislodged therefrom and drop downwardly by the force of gravity into a drawer. The drawer is periodically removed from the machine and used particles collected therein are emptied therefrom.

United States Patent 1 Bone Sept. 23, 1975 DRAPERY AND SHEET MATERIAL CLEANING MACHINE Aubra N. Bone, 13774 Florine, Paramount, Calif. 90723 [22] Filed: Jan. 15, 1974 [2]] Appl. No.: 433,456

[76] Inventor:

Primary ExamirierPeter Feldman Assistant Examiner-Philip R. Coe

- Attorney, Agent, or Firm-William C. Babcock [57] ABSTRACT A machine for cleaning sheet materials such as draperies, or the like, by the abrading action of minute particles which serve as carriers for a cleaning compound. The draperies are first tumbled with the particles until the draperies are cleansed. Thereafter, the draperies are subjected to a stream of air of a desired velocity as they are tumbled to remove the particles therefrom. The velocity of the stream of air chosen to so remove particles is related to the weight of the draperies; that is, the heavier the draperies, the greater will be the velocity of the air stream employed to remove the particles.

After removal from the draperies, the particles are carried by the stream of air to a number of inverted filter bags. These bags are sufficiently porous as to permit air to pass therethrough, but capture the particles within the confines thereof. The bags are subjected to vibration whereby the particles adhering to the interior of the bags are dislodged therefrom and drop downwardly by the force of gravity into a drawer. The drawer is periodically removed from the machine and used particles collected therein are emptied therefrom.

9 Claims, 8 Drawing Figures US Patent Sept. 23,1975 Sheet 1 of2 3,906,756

US Patent Sept. 23,1975 Sheet 2 of2 3,906,756

P- m8 My DRAPERY AND SHEET MATERIAL CLEANIN MACHINE BACKGROUND or THEINvENT oN 1. Field of the Invention Drapery and Sheet Material Cleaning Machine.

2. Description of the Prior Art In the past, various types of drapery cleaning machines have been devised and used wherein minute particles are brought into abrading cleansing contact with draperies or other sheet material, andwith the particles at the conclusion of the cleansing operation being separated from the draperies by a stream of air of uniform velocity. The stream of air carried the particles to a number of filter bags in which the particles were captured and tended to cling to the interior surfaces thereof.

Such prior art devices had the operational disadvantage that when a stream of air was used at a velocity sufficient to separate particles from heavy tumbling draperies, it would, when used on light draperies, blow the latter into a position in a rotating drum where they would obstruct discharge of air and particles from the drum. Also, in such prior art devices the interior of the filter bags became coated with particles, rendering it difficult, if not impossible, to draw a stream of air of substantial magnitude therethrough. Both of these operational disadvantages seriously impaired the efficiency of prior art drapery cleaning machines.

A major object of the present invention'is to provide a drapery cleaning machine of simple mechanical structure, that requires little or no maintenance, is simple and easy to use, and is highly efficient in that it is free of the two operational disadvantages previously described. I r 1 SUMMARY OF THE INVENTION A substantially rectangular housing that is internally subdivided to define first, second, third and fourth compartments. A power-driven drum is rotatably supported in the first compartment, with the drum holding Thethird compartment supports a drawer from which particles collected in the filter bags may drop downwardly thereinto.

The fourth compartment has an opening formed therein which is closed by a door during the time the draperies are being tumbled in contact with the particles. After the cleansing operation is completed, the. 'door is pivoted to a second positionby a pressure fluid- ;actuated device to permit a stream of air at a desired velocity to flow through the rotating drum to separate the particles from the draperies and carry the particles 1 into the confines of the filter bags. The filter bags are vibrated to dislodge collected particles from the interior surfaces thereof, with the particles dropping down being blow to positions in the drum where they prevent the free discharge of a stream of air with the entrained,

particles from the drum. Unless the air and entrained particles'are-free to leave the drum, the cleansed draperieswill have particles adhering thereto when removed from' the machine.

' BRIEF DESCRIPTION OF THE DRAWINGS FIG. 5 is a longitudinal cross-sectional view of the machine, taken on the line 55 of FIG. 4;

FIG. 6 is a fragmentary vertical cross-sectional view ofthe machine, taken on the line 6-6 of FIG. 3;

FIG. 7 is a vertical cross-sectional view of the air stream velocitycontrol door; and

FIG. 8 is a fragmentary, vertical cross-sectional view of one of the spring-supported filter bags, taken on the line 88 of FIG. 4.

DESCRIPTION OF THE PREFERRED EMBODIMENT The drapery cleaning machine A, as shown in FIGS. 1-5 inclusive, includes a housing assembly B, which is defined by rigid sheet material and reinforcing means and includes ahorizontal top 10, first and second end walls 12 and 14, first and second side walls 16 and 18, and a base frame 20. The base frame 20 is secured to the lower portions of end walls 12, 14 and side walls 16, I8. Within the confines of end walls 12, 14 and side walls 16, 18, the base frame 20 supports a first horizontal base plate 22.

A first vertical transverse partition 24 disposed within the housing assembly B divides the interior thereof into first, second and third compartments C, D and E, respectively. The third compartment E is in vertical alignment with second compartment D and is situated beneath the first base plate 22. A first horizontal tubular shell 26 extends into the first compartment C from a first opening 26a defined in first end wall 12. A second horizontal tubular shell 28 extends into the first compartment C from the first partition 24, and the second shell is'coaxially aligned with the first shell 26.

A second partition 30 and a pair of spaced end pieces 32 cooperate with the first shell 26, the first end wall 12, and top 10 to define a fourth compartment F that is best' seen in FIG. 5. A second opening 34 is formed in the second partition 30 and is preferably of elongate rectangular shape, and may be placed in communication with a third opening 36 formed in the upper portion of the first tubular shell 24.

A first door 38 is supported by hinges 40 from the exterior surface of first end wall '12. First door 38 is provided with a manually operable lock 42 to hold it in sealing engagement with first opening 26a. Door 38 is preferably provided with a transparent insert 38a to permit draperies 'H, or other sheet material disposed within themachine A, to be viewed.

A rotatable, cylindrical, substantially horizontal drum] is rotatably supported in thefirst compartment C. Drum J is. defined by a cylindrical side wall 44 and first andsecond end pieces 46 and 48 respectively. The end piece 46 has a fourth opening 50'formed therein through which the first tubular shell 26 extends. The second end piece 48 has a fifth opening 52 formed therein from which a third tubular shell 54 projects outwardly. The drum J serves to hold the draperies H that are to be cleansed by tumbling contact with a large number of particles K which serve as carriers for a cleaning compound. The draperies are placed in and removed from the interior of drum J by use of the first opening 26a.

First means L are provided for rotatably supporting the drum J within the first compartment C. The first means L, as shown in FIGS. 3 and 5, include two parallel, laterally spaced shafts 56 and are rotatably sup ported at the end portions thereof by bearings 58 that are secured to the upper surface of first base plate 22. Rollers 60 are rigidly secured to shafts 56, and the rollers frictionally engage the drum J in first compartment C. Shafts 56 adjacent first partition 24 have sheaves 62 mounted thereon that are drivingly engaged by an endless resilient belt 64. The belt 64 also engages a driving pulley 66 that is rotated by an electric motor 68 which is shown in FIG. 2.

A first resilient sealing ring 70 is provided that is mounted on the first shell 26 and is in rotatable sealing contact with that portion of the first end wall 12 adjacent the first opening 26.

A second resilient sealing ring 72 pressure contacts the exterior surfaces of the second and third tubular shells 26 and 54 respectively, as shown in FIG. 5, and prevents air from the first compartment C entering the space between the adjacent ends of the second and third shells.

An electric motor 74 drives a blower 76, as may be seen in FIG. 4, which motor and blower are supported within housing B by conventional bracket means 78. A portion of the second compartment D is defined by a vertical longitudinal wall 80 that has an air intake opening 82 formed therein in which a screen 84 is disposed. The air intake opening 83 communicates with the suction side of blower 76. The discharge 76a of blower 76 is connected to a duct 86 that passes upwardly through the top to the ambient atmosphere.

The first base plate 22 within second compartment D has a number of spaced openings 88 formed therein from which short tubes 90 extend upwardly as shown in FIGS. 5 and 8. A number of vertically disposed filter bags M are positioned in second compartment D. Each bag M includes a tube 92 of porous sheet material that is sufficiently tightly woven to capture particles K discharged into the interior of the tube but not so tightly woven as to prevent air from flowing .therethrough. Each tube 92 includes a lower open end 92a and an upper open end 92b. By means of a clamp 94, as may be seen in FIG. 8, the lower open end 92a is held in sealing engagement with one of the tubes 90. Each of the tubes 92 is provided with a clamp 96 which maintains it in sealing engagement with an associated plug 98. Each plug 98 is formed from a solid material such as wood, or the like.

Each of the plugs 98 is secured to the lower end of a light. vertically disposed first helical spring 100. The upper ends of first helical springs 100 are secured to a horizontal frame 102 that is disposed in the upper part of second compartment D, with the frame in turn being supported by a number of helical springs 104, the upper ends of which are secured to top 10.

An electrical motor 106 is mounted on the under side of top 10 within the second compartment D. Motor 106 drives a first cam 108, which as it rotates, is in rubbing contact with a rigid member 110 that extends upwardly from frame 102. As the cam 108 rotates, it imparts vibratory movement to frame 102 and filter bags M, whereby particles K clinging to the interior surfaces of the bags are dislodged therefrom and drop downwardly by force of gravity through tubes 90 into the third compartment E. The lower end of third compartment E is defined by a second base plate 112 that is secured to the base frame 20. The lower portion of the third compartment E has a drawer 114 in the lower portion thereof into which the particles K fall after being dislodged from the filter bags M. The drawer 114 may be withdrawn through an opening 116 formed in thebase frame 20, as shown in FIG. 5.

The first compartment C is in communication with the ambient atmosphere by means of an opening 118. A second door 120 is pivotally supported by hinges 122 from second partition 30, with the door 120 being of sufficient size as to span the second opening 34 when the door is in a first downwardly depending position. The second door 120 is provided with a pad 124 of resilient-material and mounted thereon in the manner shown in FIG. 7 to seal against the second partition 30 when an inwardly directed force is exerted on the door.

During the time the draperies M are being cleansed by tumbling with the particles K in the drum J, it is desirable that the second door 120 seal the second opening 34 to prevent particles from moving upwardly through the third opening 36 and second opening 34 into the first compartment C where they serve no useful purpose, and are wasted. A second rotatable cam 126 is provided, as shown in FIG. 7, that serves not only to hold the second door 120 in the first position in sealing contact with the second partition 30, but also controls the degree to which the second door 120 can move into the second position when a negative pressure is effected in the second compartment D and drum J by operation of the blower 76. As soon as such'a negative pressure is initially effected in the drum J and second compartment D, the greater air pressure in the first compartment C will cause the second door 120 to pivot outwardly towards the-first end wall 12 to a second position. The second cam 126 prevents the second door 120 pivoting open beyond a desired second position.

Second cam 126 is rigidly secured to a transverse shaft 128, which by conventional means (not shown), is rotatably supported from the housing B adjacent the second door 120, as illustrated in FIG.'7. Shaft 128 has a lug 130 rigidly secured thereto, which lug by means of a pin 132 is pivotally connected to the outer'end portion of a piston rod 134 that is longitudinally movable in a cylinder 136. The cylinder 136 has an end portion 138 thereof pivotally supported on a transverse member 140 that is secured to the interior of the housing assembly B. Fluid under pressure may be discharged into and out of the interior end portions of the cylinder 136 through first and second conduits 142 and 144, respectively, as shown in FIG. 6. The source of the fluid under pressure and the piping and valving to control the flow of fluid through the first and second conduits 142 and 144 is conventional and is not shown in the drawings. The drapery cleaning machine A may be manually operated'or placed in a timed sequence, andto that end, a control panel N is provided as shown in FIG. 1

that has a number of push buttons mounted thereon that control electric Switches and relays on an electric circuit of conventional design. The appropriate buttons 0 pushed inwardly start operation of the drapery cleaning machine A as well as stop the same when it is being operated manually. Likewise, certain of the buttons 0 when pushed inwardly sequentially actuate the electrical components of the drapery cleaning machine A in a timed cycle, for the particles K to clean the draperies H, and they by air means remove from the draperies, with the particles being collected in the drawer 114 as previously described.

Irrespective of whether the drapery cleaning machine A is manually operated or operated on a timed cycle, the sequence of steps in the operation of the machine are the same. The draperies H to be cleaned are inserted into the drum J through the first opening 26a, with the door 38 in the open position. 7

After the draperies are so inserted the door is closed as shown in FIG. 1 and held in the closed position by the lock 42. The cam 126 is now rotated to theposition shown in FIG. 7 by use of pressurized fluid in the cylinder 136, and the second cam 126 when disposed in the position shown in FIG. 7 forcing the pad 124 into sealing engagement with the portion of the second partition surrounding the second opening 34. The appropriate push button 0 is now pressed inwardly to energize the motor 68, to rotate the drum, and tumble the draperies H in contact with a number of the particles K that are also in the drum. As the draperies H and particles K tumble together the particles brought into light abrating contact with the particles and the cleaning compound in the particles serving to remove foreign materials in the draperies.

Normally the drum J will rotate at approximately 27 to 28 revolutions per minute for it is not desirable to rotate the drum at such a high rate of speed that the draperies are flung outwardly to the interior of the drum by centrifugal force exerted in the draperies to rotate with the drum.

In FIG. it may be noted that a convex, concave member 128 that has a large number of perforations 130 therein is secured to the second end piece 48, and this member serving to prevent the draperies withinthe confines of the drum J moving longitudinally therein to a position where they would obstruct the flow of air through the fifth opening 52.

After the draperies have been cleaned as above described, the motor 74 is energized to actuate the blower 76, with the blower then tending to create a negative pressure within the first compartment C and the second compartment D. Pressurized fluidis now discharged through one of the conduits 142 and 144 to actuate the piston rod 134 and the piston rod being removed to a position where the second cam 126 rotates to aposition where a drum 120 is partially open as shown in FIG. 5. .The degree of opening of the second door 120 is due to the air pressure in the portion of the drum exposed to air in the first compartment C being higher than the air pressure in' the fourth compartment F. The degree that the second door 120 opens determines the rate with which air will flow through the second opening 34 and third opening 36 into the confines of the rotating drum J to separate particles K from the draperies H with the particles being sufficiently small as to pass through the opening 130 and member 128 and then flow through the path shown by arrows in'FIG. 5 into the third compartment E and then upwardly into the bag M. The particles K, after entering the bags, tend to adhere to the interior surface thereof and in so doing obstruct the air being driven through the bags by the blower 76. To minimize the power required by the motor 74 to maintain negative pressure in the second compartment D to establish the flow of air through the drum J it is desired that the particles be removed from their blocking position within the interior of the bags M.

The particles K are dislodged from the bags M by energizing the motor 106 to drive the cam 108 and the cam, as it rotates, engages the members 110 to vibrate the frame 102 and the bags M that are resiliently supported from the latter. As such vibration takes place the particles K are dislodged from the interior surface of the bags M and drop downwardly by gravity into the drawer 114 as may be seen in FIG. 5, where they collect in a pile of particles K.

After the air stream above described has removed all of the particles K from the draperies H in the drum J, the operation of the various components of the drapery cleaning machine A previously described, and the lock 42 is so positioned as to permit the door 38 to be swung to an open position and the clean draperies H removed from the machine A.

Although the filter bag supporting frame 102 will normally be vibrated by use of the motor 106, a handle 132 is secured to the frame and extends outwardly through the side wall 16 as shown in FIG. 4. By grasping the handle 132 and alternating it inwardly and outwardly the frame 102 and bag M will be vibrated to dislodge particles K from the interior of the bag to cause them to fall downwardly by gravity into the drawer l 14.

The control of the flow of air as above described permitsdraperies to be cleaned with a minimum use of electric power. The velocity of flow air through the drum J is so selected that the draperies H will be subjected to air at a maximum velocity but at a velocity insufficient to blow the draperies into an air flow obstructing position on the interior of the drum. Thus, heavy draperies when being tumbled in the drum H may be subjected to a stream of air of higher velocity then lighter draperies.

The removal of particles adhering to the interior surface of the bags M is of the utmost importance for if the particles are not so removed theygtend to block the flow of air from the interior of the bags M to the suction side of the blower 82 and a substantial greater amount of power will be used by the motor to maintain a negative pressure within the second compartment C.

The pressurized fluid previously mentioned is not only utilized to hold the second door in a sealing position as shown in FIG. 7, but also to the second cam 126 limits the maximum second position to which the second door 120 may pivot due to differential of pressure opposite sides thereof.

The use and operation of the invention has previously been described in detail and need not be repeated.

I claim:

1. A machine for cleaning sheet materials such as draperies and the like by the use of a plurality of abrading particles that are carried by a stream of air at not greater than ambient pressure and said particles serving as a carrier for a cleaning agent and said particles being recovered after they have served to clean said sheet material, said machine including:

a housing assembly that includes a horizontal top, first and second end walls, first and second side walls, a base frame secured to lower portions of said end walls and sidewalls, a horizontal first base plate secured to said base frame and extending between said end walls and sidewalls, a transverse vertical first partition intermediate said first and second end walls that divides the interior of said housing above said base plate into first and second compartments and the portion of said housing beneath said base plate and under said second compartment into a third compartment, a second horizontal base plate that closes the lower portion of said third compartment, a first horizontal tubular shell that extends inwardly into said first compartment from a first opening in said first end wall, a second horizontal tubular shell that extends inwardly into said first compartment from said first partition and is coaxially aligned with said first shell, a second vertical partition and a pair of end pieces that cooperate with the upper portion of said first tubular shell, said first end wall and said top to define a fourth compartment, said second partition having a second opening therein, and said first tubular shell having a third opening therein that is in communication with the interior of said fourth compartment;

b. a first door movably supported from said first end wall for closing said first opening during the cleaning of said sheet material;

. a rotatable, cylindrical, substantially horizontal drum situated in said first compartment, said drum including first and second end pieces, said first end piece having a fourth opening formed therein through which said first tubular shell extends, said second end piece having a fifth opening therein, and said drum including a third tubular shell that is axially aligned with said second tubular shell, with said third tubular shell supported from said second end piece and in communication with said fifth opening therein;

d. first means for rotatably supporting said drum in said first compartment;

second means for effecting a movable seal between said first tubular shell and said first end piece of said drum;

. third means for effecting a movable seal between said second and third tubular shells as said drum rotates;

fourth power operated means for rotating said drum with said sheet material therein;

. fifth power operated means that tend to maintain a negative pressure in said second compartment; a plurality of spaced vertically disposed tubes that extend upwardly from openings in said first base plate into said second compartment;

a plurality of vertically disposed filter bags situated in said second compartment, said bags having lower open ends that sealingly engage said tubes, and said bags having closed upper ends;

sixth spring means that support said closed upper ends of said bags adjacent said top of said housing; seventh means for vibrating said sixth means and said bags to cause said particles adhering to the interior surfaces of said bags to loosen therefrom and drop downwardly by gravity into said third compartment;

m. a drawer in said third compartment for catching said particles that drop downwardly from said bags; n. a second'door pivotally supported from said second partition, said second door when in a first posi-- tion closing said second opening, but said second door when there is a negative pressure in said second compartment tending to pivot to a second position to permit air to flow through said second and third openings and longitudinally through said drum as a stream to free said sheet material in said drum of said particles eighth means for limiting the pivotal movement of said second door to a specific second position where said air flows through said second and third openings and said drum to said second compartment as a stream at a desired velocity and for locking said door in a closed position; and

p. ninth means for preventing said stream of air flowing through said drum carrying said sheet material longitudinally therein to the extent that said sheet material enters said third tubular shell and clogs the latter.

2. A machine as defined in claim 1 in which said first means includes:

q. two parallel laterally spaced shafts disposed in the lower portion of said first compartment;

r. bearing means that rotatably support said shafts at fixed positions above said first base plate; and

s. a plurality of rollers mounted on said shaft on which said drum rests, said rollers frictionally contacting said drum, and said rollers and shafts when rotated causing concurrent rotation of said drum.

3. A machine as defined in claim 2 in which said fourth means include:

t. a first electric motor that includes a driving pulley;

u. two sheaves mounted on said shafts, said sheaves and driving pulley in vertical alignment; and

v. an endless resilient belt that engages said driving pulley and said sheaves.

4. A machine as defined in claim 2 in which said fifth power operated means is an electric motor operated blower that has a suction side thereof in communication with said second compartment and a discharge side thereof in communication with the ambient atmosphere.

5. A machine as defined in claim 2 in which said filter bags have upper ends that are defined by a rigid material and said sixth spring means including:

t. a horizontal rigid frame disposed in said second compartment above said bags; u. a plurality of first helical springs secured to said upper ends and to said frame; and v. a plurality of second helical springs that extend up- 8. A machine as defined in claim in which said eighth means is a rotatable cam which when in a first position locks said second door in a closed position and said cam when rotated to a second position allowing said door to pivot to a desired second position to con-' trol the velocity of air flow through said drum. 

1. A machine for cleaning sheet materials such as draperies and the like by the use of a plurality of abrading particles that are carried by a stream of air at not greater than ambient pressure and said particles serving as a carrier for a cleaning agent and said particles being recovered after they have served to clean said sheet material, said machine including: a. a housing assembly that includes a horizontal top, first and second end walls, first and second side walls, a base frame secured to lower portions of said end walls and sidewalls, a horizontal first base plate secured to said base frame and extending between said end walls and sidewalls, a transverse vertical first partition intermediate said first and second end walls that divides the interior of said housing above said base plate into first and second compartments and the portion of said housing beneath said base plate and under said second compartment into a third compartment, a second horizontal base plate that closes the lower portion of said third compartment, a first horizontal tubular shell that extends inwardly into said first compartment from a first opening in said first end wall, a second horizontal tubular shell that extends inwardly into said first compartment from said first partition and is coaxially aligned with said first shell, a second vertical partition and a pair of end pieces that cooperate with the upper portion of said first tubular shell, said first end wall and said top to define a fourth compartment, said second partition having a second opening therein, and said first tubular shell having a third opening therein that is in communication with the interior of said fourth compartment; b. a first door movably supported from said first end wall for closing said first opening during the cleaning of said sheet material; c. a rotatable, cylindrical, substantially horizontal drum situated in said first compartment, said drum including first and second end pieces, said first end piece having a fourth opening formed therein through which said firsT tubular shell extends, said second end piece having a fifth opening therein, and said drum including a third tubular shell that is axially aligned with said second tubular shell, with said third tubular shell supported from said second end piece and in communication with said fifth opening therein; d. first means for rotatably supporting said drum in said first compartment; e. second means for effecting a movable seal between said first tubular shell and said first end piece of said drum; f. third means for effecting a movable seal between said second and third tubular shells as said drum rotates; g. fourth power operated means for rotating said drum with said sheet material therein; h. fifth power operated means that tend to maintain a negative pressure in said second compartment; i. a plurality of spaced vertically disposed tubes that extend upwardly from openings in said first base plate into said second compartment; j. a plurality of vertically disposed filter bags situated in said second compartment, said bags having lower open ends that sealingly engage said tubes, and said bags having closed upper ends; k. sixth spring means that support said closed upper ends of said bags adjacent said top of said housing; l. seventh means for vibrating said sixth means and said bags to cause said particles adhering to the interior surfaces of said bags to loosen therefrom and drop downwardly by gravity into said third compartment; m. a drawer in said third compartment for catching said particles that drop downwardly from said bags; n. a second door pivotally supported from said second partition, said second door when in a first position closing said second opening, but said second door when there is a negative pressure in said second compartment tending to pivot to a second position to permit air to flow through said second and third openings and longitudinally through said drum as a stream to free said sheet material in said drum of said particles o. eighth means for limiting the pivotal movement of said second door to a specific second position where said air flows through said second and third openings and said drum to said second compartment as a stream at a desired velocity and for locking said door in a closed position; and p. ninth means for preventing said stream of air flowing through said drum carrying said sheet material longitudinally therein to the extent that said sheet material enters said third tubular shell and clogs the latter.
 2. A machine as defined in claim 1 in which said first means includes: q. two parallel laterally spaced shafts disposed in the lower portion of said first compartment; r. bearing means that rotatably support said shafts at fixed positions above said first base plate; and s. a plurality of rollers mounted on said shaft on which said drum rests, said rollers frictionally contacting said drum, and said rollers and shafts when rotated causing concurrent rotation of said drum.
 3. A machine as defined in claim 2 in which said fourth means include: t. a first electric motor that includes a driving pulley; u. two sheaves mounted on said shafts, said sheaves and driving pulley in vertical alignment; and v. an endless resilient belt that engages said driving pulley and said sheaves.
 4. A machine as defined in claim 2 in which said fifth power operated means is an electric motor operated blower that has a suction side thereof in communication with said second compartment and a discharge side thereof in communication with the ambient atmosphere.
 5. A machine as defined in claim 2 in which said filter bags have upper ends that are defined by a rigid material and said sixth spring means including: t. a horizontal rigid frame disposed in said second compartment above said bags; u. a plurality of first helical springs secured to said upper ends and to said frame; and v. a plurality of second helical springs that extend upwardly from saId frame to said top to resiliently support said frame from said top.
 6. A machine as defined in claim 5 in which said seventh means includes: w. a rigid member secured to said frame; and x. a motor driven cam that rotatably engages said member to vibrate said frame and said filter bags supported therefrom by said first helical springs.
 7. A machine as defined in claim 5 in which said seventh means includes: w. a rigid elongate handle rigidly secured to said frame and extending outwardly through an opening in said housing assembly.
 8. A machine as defined in claim 5 in which said eighth means is a rotatable cam which when in a first position locks said second door in a closed position and said cam when rotated to a second position allowing said door to pivot to a desired second position to control the velocity of air flow through said drum.
 9. A machine as defined in claim 8 in which said eighth means also includes pressure fluid actuated means for rotating said cam to either said first or second positions. 